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Xx July 1999 AGE -NC Project No. 99-0557 Page 3 of 8 located in the dealership service area. Soil probe borings P-11 through P-12 were advanced adjacent to active in -ground hydraulic lifts located in the auto body shop building. Probe borings P-13 and P-14 were located at areas of surficial staining observed along the southeast corner of the dealership service department, as well as the southeast corner of the auto body shop. The areas of surficial staining appeared related to hydraulic lift pressure -release outlets at the locations. Soil probe boring P-15 was advanced adjacent to an abandoned in -ground hydraulic lift located in the wash -down and detailing unit of the auto body shop building. Soil probe borings P-16 and P-17 were completed at the former locations of the waste oil UST and gasoline UST, respectively. Soil probe borings P-1 through B-12, and P-15 were advanced to depths of 15.5 feet below surface grade (bsg) to assess the potential for hydrocarbon impacts to soil and/or ground water below the base of each of the lift units. Probe borings P-13 and P-14 were advanced to a depth of 10.5 feet bsg to assess the vertical extent of potential hydrocarbon impacts at locations of surficial staining. Soil probe borings P-16 and P-17 were advanced to depths of 3 0. 5 feet bsg to assess the vertical extent of potential petroleum hydrocarbon impacts to soil and/or ground water related to the former gasoline and waste oil USTs. 4.2. SOIL SAMPLE COLLECTION AND ANALYSIS Discrete soil samples were collected from each of the soil probe borings at selected depths below the vertical extent of former UST, hydraulic lift, and surficial staining locations. Generally, soil samples were collected from the soil probe borings at five-foot intervals from approximately 5 feet bsg to the total depth of the borings. Soils were visually described and logged in accordance with the Unified Soil Classification System (USCS). Boring logs are presented in Appendix B. Soil sample collection procedures are presented in Appendix A. Soil samples were selected for laboratory analysis based on field observations and organic vapor meter (OVM) readings. Selected soil samples were submitted to McCampbell Analytical Inc. (MAI) in Pacheco, California. MAI is a State of California Department of Health Services (DHS) -certified laboratory. Soil samples were analyzed for following constituents: BTEX by EPA Method 8020; and TPH as gasoline (TPH-g), as diesel (TPH-d), and as motor oil (TPH-mo) by EPA Method 8015 Modified/5030. In addition, soil samples collected from the former gasoline UST location (P-17) were analyzed for: MTBE by EPA Method 8020. Advanced CeoEnvironmental, Inc.